Island



(No Model.)

- F. MQGABE.

STEAM WHISTLE.

Patented Sept. 25, 1883.

WITNESSES ATTORNEYS.

N. PETERS. Pholaljthngmpmn Wuh'mgtml. 0, l1

UNITED STATES PATENT FFICE.

.FRANKVMOOABE, on PROVIDENCE, nnonn ISLAND.

STEAM-WHISTLE.

SPECIFICATION forming part of Letters Patent No. 285,639, dated September 25, 1883.

Application filed December 16, 1882. (No model.)

To all whom, it may concern.-

Be it known that I, FRANK MOCABE, of Providence, in the county of Providence and State of Rhode Island, have invented a new and Improved Steam-Whistle, of which the following is afull, clear, and exact description.

The object of my invention is to provide a steam-whistle of inexpensive construction; and it consists in a hollow whistle slotted at one side for the escape of steam, and provided with an adjustablelip-plate, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding-parts in all the figures.

Figure 1 is a front elevation of my improved whistle. Fig. 2 is a plan view of the same. Fig. 3 is a longitudinal section on line a: qr, Fig. 1. Fig. 4 is a cross-section on line 3 y, Fig. 3. Fig. 5 is alongitudinal section, show ing the whistle as fitted for use as a low-water indicator.

A is the whistle, consisting of a fiat tubular portion, a, and at its closed end an enlarged portion, b, which forms asteam-chamber. At one side of the chamber b is a transverse slot, 0, over which is fitted a plate, (1, attached by means of a screw, 6, passing through a slot in the plate, so that the plate can be adjusted to close the slot 0 more or less, in order to make the whistle to sound more or less shrilly. In Figs. 1,2, 3, and 4 the lower end of the tube a opens at one side, and is formed with flanges for attachment upon a tube, B,and in the tube B is. fitted a valve, Z, that is closed upward against its seat by a spring, m, so that when the whistle is applied to a boiler the valve will cut off the steam, and a lever, in, is provided for'forcing the valve 1' downward to admit steam to the whistle. 5

When used as a low-water indicator, the whistle is to be attached, as shown in Fig. 5, to the end of a tube, 0, which will be connected to the water-space of the boiler.

The body of the whistle can be readily formed of cast metal, and its construction is simple and inexpensive.

The lip-plate d can be readily adj usted to obtain either a shrill or a deep sound, as may be 5( desired, according to the location or use, and for that reason comparatively, few sizes of whistles will be required to produce a great variety of sounds. It is evident that when no adjustment is wanted the plate (1 may be dispensed with and the slot 0 made more or less wide.

I am aware that it is not new in steamwhistles to use a valve closed by gravity or a spring, and opened by pressing with a pivoted 6( bar or arm upon the valve-rod, or to form a chamber above the aperture through which the steam passes in order to produce the whistling sound; but

'What I do claim is- 6 The lip d, having a slot and a clamp-screw,

e, in combination with the neck a and chamber b, the front of neck a being extended be yond the front of said chamber, whereby the lip d will be brought into the same plane with. 7 the front of neck a, and may be graduated in its distance therefrom, as shown and described.

FRANK MOOABE.

\Vitnesses:

JOHN MAGEE, WM. B. AVERY. 

